Which of the following choices is not a basic feature of cellular communication?
A) The signal must be produced.
B) The signal can be produced only by a eukaryote.
C) The signal must be transported to a target cell.
D) The target cell must respond to the signal.
Answer: B
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Which of the labeled layers in the diagram of the arterial wall consists mainly of elastic fibers and smooth muscle fibers?
a) A b) B c) C d) A and B e) A, B and C
Asthma is a respiratory disease in which _____.?
A) ?the mucous membrane of the trachea becomes inflamed B) ?an inflammatory response obstructs the airways C) ?the lungs become infected and filled with pus D) ?swallowing is difficult and painful
If a diabetic patient received too much insulin, the low blood sugar could be corrected by injecting
A) glucagon. B) GHIH. C) thyroid hormone. D) aldosterone. E) antidiuretic hormone.
What is heartburn and what causes it?
What will be an ideal response?